International Tables for Crystallography (2006). Vol. A, ch. 1.4, pp. 7-11
https://doi.org/10.1107/97809553602060000503

Chapter 1.4. Graphical symbols for symmetry elements in one, two and three dimensions

Related articles

Related articles within International Tables are as follows:

Volume A: Space-group symmetry (first online edition, 2006)